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package lsp
import (
"context"
"errors"
"testing"
"codeberg.org/snonux/hexai/internal/llm"
)
// fakeCodeLLM implements both llm.Client and llm.CodeCompleter.
type fakeCodeLLM struct {
codeCalls int
chatCalls int
result string
codeErr error
}
func (f *fakeCodeLLM) CodeCompletion(_ context.Context, _ string, _ string, n int, _ string, _ float64) ([]string, error) {
f.codeCalls++
if f.codeErr != nil {
return nil, f.codeErr
}
if n <= 0 {
n = 1
}
out := make([]string, n)
for i := 0; i < n; i++ {
out[i] = f.result
}
return out, nil
}
func (f *fakeCodeLLM) Chat(_ context.Context, _ []llm.Message, _ ...llm.RequestOption) (string, error) {
f.chatCalls++
return "chat", nil
}
func (f *fakeCodeLLM) Name() string { return "fake" }
func (f *fakeCodeLLM) DefaultModel() string { return "m" }
func TestTryLLMCompletion_PrefersCodeCompleterOverChat(t *testing.T) {
s := newTestServer()
s.cfg.MaxTokens = 32
s.cfg.TriggerCharacters = []string{"."}
s.compCache = make(map[string]string)
initServerDefaults(s)
fake := &fakeCodeLLM{result: "DoThing()"}
s.llmClient = fake
line := "obj."
p := CompletionParams{Position: Position{Line: 0, Character: len(line)}, TextDocument: TextDocumentIdentifier{URI: "file://x.go"}}
items, ok, _ := s.tryLLMCompletion(p, "", line, "", "", "", false, "")
if !ok || len(items) == 0 {
t.Fatalf("expected completion items via CodeCompleter path")
}
if fake.codeCalls == 0 {
t.Fatalf("expected CodeCompletion to be called")
}
if fake.chatCalls != 0 {
t.Fatalf("did not expect Chat fallback when CodeCompletion succeeds")
}
}
func TestTryLLMCompletion_FallsBackToChatOnCodeCompleterError(t *testing.T) {
s := newTestServer()
s.cfg.MaxTokens = 32
s.cfg.TriggerCharacters = []string{"."}
s.compCache = make(map[string]string)
initServerDefaults(s)
fake := &fakeCodeLLM{result: "DoThing()", codeErr: errors.New("boom")}
s.llmClient = fake
line := "obj."
p := CompletionParams{Position: Position{Line: 0, Character: len(line)}, TextDocument: TextDocumentIdentifier{URI: "file://y.go"}}
items, ok, _ := s.tryLLMCompletion(p, "", line, "", "", "", false, "")
if !ok {
t.Fatalf("expected ok=true even on fallback path")
}
if len(items) == 0 {
t.Fatalf("expected some items from Chat fallback")
}
if fake.codeCalls == 0 {
t.Fatalf("expected CodeCompletion to be attempted first")
}
if fake.chatCalls == 0 {
t.Fatalf("expected Chat fallback to be called when CodeCompletion errors")
}
}
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